/ attention to yield potential is especially required among researchers in the

US and CIAT. However, the emphasis on breeding for disease resistance should

continue at the national program level, where many scientists have been

trained in this area. The CRSP and CIAT should narrow their disease

resistance breeding programs and focus on major, unresolved problems, such as

BGMV, web blight and, possibly, BYMV. New research emphasis should be funded

by shifting resources: In the case of the CRSP, by concentrating more on basic

research; and in the case of CIAT, by decentralizing research and supporting

the genetic improvement through well-trained national programs.

Table 1. Results of black IBYAN trial of 1982 in 7 locations where
yields were recorded above 3 t/ha and thus approach the
genetic potential of the species, and average over all 36
locations where the trial was planted.

Yield 7 best Yield over all
Variety/line locations 36 locations

Best CIAT bred line 3739

Jamapa 3412 1852

XAN 78 3298 1934

EMP 84 3256 1981

As above for IBYAN 1981 (4 and 22 sites respectively)

Best CIAT bred line 4004

Jamapa 3634 1723

BAT 804 3522 1852

BAT 873 3477 1850

REFERENCES

Bean/Cowpea Collaborative Research Support Program (CRSP). 1984.
Collaborative Research in the International Agricultural Research and
Development Network; a Case Study. Program Report, May 1984. 157 pp.